It is working for me too. I am using MGC_8.1.101_A9_PV0i_MGC.apk from https://www.celsoazevedo.com/files/android/google-camera/dev-bsg/f/dl1/ and I even tried video with the wide lens and it works, which wasn't working with 7.3 GCams. But don't try to use 0.9 Lens options because aren't working and force crash. I have a Redmi NOte 8T (Willow EU)strange, i have the same camera problems in every 11 rom, did a clean flash with everything formatted. Video recording is not working in any camera app for me